In all of our projects we have a common field set for the Squad working on it.
Some of our projects have been mistakenly using independent value sets. I have merged this using the "Merge with" function on the project page, with disastrous results.
Note the new ones prefixed with "Borrowers Tribe - Ladders" - I have tried to delete these and replace with the unprefixed version. There is no error but upon refreshing the values have not been updated.